EEPORT ON THE HEXACTINELLIDA. 



yOO 



Holascinre, 85, 3G7. 

 Holascus, n. gen., 85, 367. 



„ fibulatas, n. sp., 87, 368 (Pis. xv., xvi.). 

 „ poleja'evii, n. sp., 89, 368 (PI. xvii.). 

 „ ridleyi, n. sp., 90, 368 (PI. xvii.). 

 „ dellatus, n. sp., 86, 36S (PI. xiv., xv.). 

 Holtenia, Wyv. Thomson, 115, 234. 



„ catyenteri, Wyv. Thomson, 235. 

 ,, jwurtalesii, (O. Schmidt), 236, 238. 

 H yaloclixte possieti^ Brandt, 182. 

 Ilijalonema, Gray, 179, 189, 381. 



„ sens, strict., subgen., 190. 



affine (Mar.shall), 187, 216, 217. 

 „ anonialum (Bowerbank), 188. 



,, arcticum (Hansen), 189. 



„ eebuense, Higgin, 186, 228, 385. 



eonus, 209, 383 (PI. xxxiii.). 

 „ divergens, n. sp., 199, 382 (PI. xxviii.). 



gracile, 196, 382 (PL xxvii.). 

 l-entii, 0. Schmidt, 207, 382 (Pi. xxx.). 

 „ loveiii, Wyv. Thomson, 186. 



,, lusitanicum, Barboza du Bocage, 183, 214, 



225, 385 (Pl.s. xxxviii., xxxix.). 

 „ mirabile, Bowerbank, 184. 



„ mirabilis, 181. 



parallelum, M'Coy, 183, 188. 

 „ pocidum, n. sp., 208, 383 (PI. xxxiii.). 



„ rohmtum, n. sp., 229, 386 (PI. xxxii.). 



„ schultzei ( = Semperella), 259. 



sieholdii. Gray, 181, 190, 381 (PI. xxvii.); 

 spicules, 192. 

 „ smithii, Young and Young, 188. 



„ tenue, n. sp., 228, 386 (PL xxx.). 



„ thomsoni, 187. 



„ thomsoni, var. exiguum, 214. 



toxeres, Wyv. Thomson, 188, 201, 202, 

 203, 382 (PL xxix.). 

 „ (Stylocalyx) apertum, n. sp., 214. 



„ [Stylocalyx) clavirjerum , n. sp., 220 (PI. 



xli.). 

 „ {Stylocalyx) depressum, n. sp., 217, 219. 



„ {Stylocalyx) elegam, n. sp., 223 (PI. xsxi.). 



„ {Stylocalyx) glohiis, n. sp., 221 (PL xL). 



„ {Stylocalyx) tenerum, n. sp., 224 (PL 



sxxi.). 

 „ {Stylocalyx) thomsoni, Marshall, 211. 



„ species diversae indefinite, 231 (Pis. xxxii., 



xxxix.). 

 Hyalonematidae, Gray, 178, 381; bathymetrical dis- 

 tribution, 457, 459; geographical, 438. 



(ZOOL. CHALL. EXP. — PART LIII. 1887.) 



Hyalonematina?, F. E. S., 178, 381. 

 Ilyalostylus, n. gen., 110, 371. 



,, dives, n. sp., 110, 371 (PL Ixx.). 



Hyalothauma ludelcingi { = Semperella), 260. 

 Hyalothrix lusifanica. Gray, 185. 

 Hymedesmia johnsuni (Bowerbank), 272. 

 Hypodermalia, 44, 49. 

 Hypogastralia, 45, 49. 



Indian Ocean, 440; Aidascus, 118; Malacosaccm, 91. 

 Inermia, 341, 402; bathymetrical distribution, 457, 459. 

 Jphiteon heatrix (Bowerbank), 306. 

 Gray, 345. 



caUocyatlms, Gray, 345. 

 ingalli, Bwk., 345. 

 panicea, Valenciennes, 306, 344. 

 suhglohosa. Gray, 345. 

 Intermedia, 49. 

 Japan, Acanthascus, 376 ; Aphrocallistes, 396 ; Bathy- 



dorus, 151; Cavlophacus, 126, 373; Chone- 



lasma, 398; JSuplectella, 78, 366; Eurete, 392; 



Hexactinella, 399, 400; Hyalonema, 191, 381 ; 



Periphragella, 299, 394 ; Rhabdoccdyptus, 377. 

 Japanese composition of sponge, 184. 

 Jeffreys, Gwyn, Aphrocallistes hocagei, 308 ; Rossella, 



143. 

 JoaneUa, O. Schmidt, 16. 

 Juan Fernandez, Hyalonema, 208, 383 ; Hyalonema 



poculum, 208. 

 Kaliapsis (Gray), 346. 

 Kent, Saville, Asconema, 113; Aphrocallistes, 307; 



classification, 8, 9 ; Farrea, 268, 269 ; Field- 



irigia, 335 ; Holtenia, 236 ; Pheronema, 236. 

 Keratosa, 497, 498. 

 Kerguelen Island, Caulophaeus, 124; Clionelasvia, 391; 



Holascus, 88; Rossella, 139, 375. 

 Kermadec Islands, Aulochone, 168, 379; CJwnelasnta, 



397; Euryplegma, 380; Farrea, 277; Polio- 



pogon, 257 ; Walteria, 96, 369. 

 Key to Genera and Species, 407. 

 Klistermann, Hyaloiiema sieholdii, 187. 

 Labaria { = Pheronema), 246. 



„ hemisphxrica (Gray), 237, 238. 

 Lanuginella, O. Schmidt, 129, 374. 

 Lartuginella pupa, O. Schmidt, 130, 374 (PL liii.). 

 Largest forms, 40. 

 Lefroyella, Wyv. Thomson, 301, 394. 



„ decora, Wyv. Thomson, 302, 394 (PL 



Ixxxii.). 

 Leidy, Pheronema ann«, 234. 

 Leiobolidium, 0. Schmidt, 15, 238. 



Ggg65 



